The SmartSilo SS.21, capable of storing 16 tonne of wheat is our second to largest silo. The SS.21 is most popular as a dairy feed/palm kernel silo and also a fertilizer silo. One advantage with this UV stabilized plastic is that you can store anything in them, at any time. And you can keep an 'eye' on this with the user - friendly sightglasses up the side of the SmartSilo.